Autonomous system
AS19305 TNSI-AS-19305
Unclassified ARIN
Summary
Transaction Network Services
business corporate finance
TNSI-AS-19305 is operated by Transaction Network Services, Inc.
What it's used for
- The address space carries corporate infrastructure for a financial services provider, evidenced by netnames
UK-TNSI-20090604andTNSUKand reverse DNS entries pointing totnsi.comandtnsi.co.uk. - The AS announces 2816 IPv4 addresses across 5 prefixes with 7 observed neighbours, a ratio consistent with a business network rather than a transit or access provider.
Notable
- Registrants for all announced prefixes are listed as
Network Architecture; Transaction Network Services (UK) LTD; Abuse-C Role, aligning with the US-based registry holder. - The address inventory consists of five IPv4 prefixes in the 188.94.0.0/16 and 194.36.0.0/16 ranges, with no IPv6 prefixes announced.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 5 prefixes · 2.82K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 5 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS19305- Registry name
- TNSI-AS-19305
- Registrant
- Transaction Network Services, Inc.
- Abuse contact
- NetworkArchitecturalEngineering@tnsi.com
- Registered
- 2000-12-14
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 14 with no ROA
- ROAs
- 0 authorising AS19305
- ASPA
- no ASPA record
- IRR
- 100% registered · 14 of 14 announcements
- Route objects
- 24 naming AS19305
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,783 prefixes, as published 2026-10-17. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere